Samsung SYNC SGH-A707

How to check level of battery charge?

Is there any way possible to see exactly how much battery life is left (like, for example, 98%, or 20%)? Just relying on the battery bars isn't enough -- often, my phone shows three bars for days, then goes directly to one bar and then shuts down right after that. I'd like to be able to see the exact percentage of charge left, if it's possible.